seinvsseráTell them apart

Which to use

“sein” and “será” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#43,647
“sein” frequency rank
#143
“será” frequency rank
43790
confusion score

Side-by-Side Comparison

Feature sein será
Definition ser, estar. terceira pessoa do singular do futuro do presente do indicativo do verbo ser

Where the eye mixes sein and será

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
sein
4 ch
será

Why the eye confuses sein with será

A purely visual mix-up. sein (/zaɪ̯n/) and será (/se.ˈɾa/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 43790, derived from the frequency rank of both members and their visual similarity.

sein is recorded at frequency rank #43,647, classified as averb, pronounced /zaɪ̯n/. será is at rank #143, tagged as averb, pronounced /se.ˈɾa/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 43790, this pair ranks #21,798 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sein vs será

Shared letters: es. Private to "sein": in. Private to "será": .

"sein" · 4 letters · shape CVVC  ·  "será" · 4 letters · shape CVCV

Known mistypes of this pair

  • seinesin · seinn · seni · sien · ssein

Frequently Asked Questions

Can "sein" and "será" be used interchangeably?
No. They are said differently (/zaɪ̯n/ versus /se.ˈɾa/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Portuguese text, does "sein" or "será" show up more?
"será" is the more common of the two: it sits at frequency rank #143 in our Portuguese list, against #43,647 for "sein". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Eye-level mix-up between "sein" and "será" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "sein" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "será" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #21,798 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "sein" and "será" also get mixed up with nearby pairs, the highest-scored neighbour is "sein vs slip". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #21,798 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list